Shuttle bar actuating mechanism



Feb 1,, 1938.. I N. s. HARTER SHUTTLE BAR ACTUATING MECHANISM Filed Feb. 16, 1937 5 Sheets-Sheet 1 Feb 15, 1938. HARTER 2,108,375

SHUTTLE BAH ACTUATING MECHANISM Fiyad Feb. 16, 1957 3 Sheets-Sheet 2 gwlliiiili LL nr 14 N fizz/67272?- Naa/z 5 liar??? Feb. 15, 11938. N. s. HARTER SHUTTLE BAR ACTUATING MECHANISM Filed Feb. 16, 1957 5 Sheets-Sheet 5 Patented Feb. 15, 1938 UNITED STATES PATENT OFFICE Noah S. Harter, Waukegan, Ill., assignor to Cyclone Fence Company, a corporation of New Jersey Application February 16, 1937, Serial No. 126,051

4 Claims.

This invention relates to looms, one of the objects being to improve their shuttle-bar actuating mechanisms.

A specific example of a wire fabric weaving 5 loom having a shuttle-bar actuating mechanism embodying the principles of the present invention is illustrated by the accompanying drawings, in which: V

Figure 1 is a side view of the loom.

Figure 2 is an end view.

Figure 3 shows details of Figure 2 in slight perspective to facilitate an understanding of their arrangement, and

Figure 4 is an enlargement from Figure 2, looking in the direction indicated by the arrows IV-IV in the latter figure.

When the loom is in operation the longitudinal wires l are fed from bobbins 2 through heddles, mounted in the heddle frames 3, in the form of layers whose relative positions alternately change as the heddle frames 3 oppositely reciprocate. A comb 4 reciprocates back and forth toward the heddle frames 3 for the purpose of properly positioning both the longitudinal and transverse wires, the latter being fed from a bobbin carried by a shuttle which is passed back and forth between the layers of the longitudinal wires I. This shuttle is handled by opposed shuttle-bars 5. The fabric may be drawn from the loom by way of one or more suitable rollers 6. These general features are not more fully described for the reason that they are part of the prior art.

The shuttle-bars 5 ride in a shuttle-bar slide 1, the bars oppositely reciprocating to perform their shuttle exchanging function. It is with the reciprocating mechanism for these bars that the present invention is concerned.

This reciprocation of the shuttle-bars is effected through the medium of an endless chain 8 whose outer ends loop round sprocket-wheels 9 which are oppositely spaced from the center of the slide 1. Sprocket-wheels l and II serve to guide the chain 8 so that it crosses itself at the sprocket-wheel 10 to form two loops that are inverted respecting one another, with the oppositely moving sides of the loops mutually alined parallel the slide 1. The uppermost alined sides are respectively connected to the shuttle-bars by way of the latters mounts l. The chain 8 is looped about a reciprocatively powered sprocket-wheel l2 with the aid of the sprocket-wheel l0 and another sprocket-wheel I3. A shaft I4 is journaled beneath the sprocket-wheel l2 parallel with the shuttle-bar slide 1 and carries two sprocketwheels l5 and Hi to which are fixed the ends of a chain ll which loops about a sprocket-wheel I8 rotatively fixed to the sprocket-wheel I 2, whereby opposite reciprocative turning of the sprocketwheels l5 and I6 function to reciprocate the sprocket-wheel l2 and effect reciprocation of the chain 8.

The sprocket-wheel I5 is keyed to the shaft [4, whereas the sprocket-wheel I6 is carried by a bushing I9 that ilerotatively free from the shaft M. This bushing I9 is fixed to a gear 20 which is meshed with a gear 21 keyed to the shaft 14, by a fixed pinion 22. This arrangement functions to oppositely turn the sprocket-wheels l5 and I6 when the shaft l'4' is turned. Reciprocation of this shaft 14 is effected by a rack 23 meshing with a gear 24 keyed to the shaft, the rack being reciprocated by means of a crank 25 geared into the power system of the loom.

It is to be noted that the two loopsv of the endless chain 8 are radially spaced respecting one another with their portions crossing the sprocket wheel H7 in laterally spaced relationship. The portions of this chain 8 which oppositely extend from each of the shuttle-bar mounts 1 are in each instance interconnected with the mounts in laterally offset positions, whereby the chain Works straight under tension throughout its entirety. Actually, the chain 8 is not endless in the sense that it is continuously linked together, its endless character resulting from the interconnection of the ends of the two chain sections at the mounts l It is these ends that are interconnected in laterally offset relation, whereby to provide the arrangement preventing the introduction of twisting stress in the chain while it is working.

The above arrangement may be appreciated more fully from a study of Figure 3, which shows the chain extending to the left from the righthand mount l in a vertical plane ofiset to the front of the vertical plane which the chain extending to the right from this right-hand mount occupies. The chain extending to the left from this right-hand mount continues to occupy the same vertical plane as it rides over the sprocket wheels I0, l2, I3 and 9, and until it connects with the left-hand mount l The chain extending to the right from the right-hand mount I occupies the other vertical plane and continuously occupies this plane as it rides over the sprocket wheels 9, H and I0 and until it reaches the left-hand mount 1 Although the invention has been disclosed by means of a specific example in accordance with the patent statutes, it is not intended to there-- by limit its scope, except as defined by the following claims.

I claim:

1. A loom including a shuttle-bar slide, opposed shuttle-bars riding said slide, an endless chain, guide wheels guiding said chain so it crosses itself to form two loops with the oppositely moving sides of said loops mutually alined parallel said slide, means for interconnecting said sides of said loops and said shuttle-bars, a sprocket-Wheel engaging said chain, a sprocketwheel rotatively connected with the first named sprocket-wheel, a shaft, sprocket-wheels respectively fixed to said shaft and rotatively free therefrom, a chain looped over the second named sprocket-wheel with its ends fixed to the third named of said sprocket-wheels so that rotation thereof wraps this chain therearound, a gear fixed to the one of said sprocket-wheels that is rotatively free from said shaft, a second gear fixed to said shaft, a gear intergearing said gears and means for reciprocatively turning said shaft.

2. A loom including a shuttle-bar slide, opposed shuttle-bars riding said slide, an endless chain, guide wheels guiding said chain so it crosses itself to form two loops with the oppositely moving sides of said loops mutually alined parallel said slide, means for interconnecting said sides of said loops and saidghuttle-bars, and means for reciprocatively powering said chain, said loops being arranged in laterally spaced relationship with their crossing portions riding said wheels in laterally spaced relationship and oppositely extending from said shuttle-bars in each instance from laterally offset positions, whereby said chain works straight under tension.

3. A loom including a shuttle-bar slide, opposed shuttle-bars riding said slide, an endless chain, guide Wheels guiding said chain so it crosses itself to form two loops with the oppositely moving sides of said loops mutually alined parallel said slide, means for interconnecting said sides of said loops and said shuttlebars, and means for reciprocatively powering said chain, said loops being arranged in laterally spaced relationship with their crossing portions riding said wheels in laterally spaced relationship and oppositely extending from said shuttlebars in each instance from laterally ofiset positions, said chain comprising two sections rendered endless by the interconnection of their ends and said shuttle-bars by the first named means.

4. A loom including a shuttle-bar actuating chain, a sprocket-wheel engaging said chain, a sprocket-wheel rotatively connected with the first named sprocket-wheel, a shaft, sprocket-wheels respectively fixed to said shaft and rotatively free therefrom, a chain looped over the second named sprocket-wheel with its ends fixed to the third named of said sprocket-wheels so that rotation thereof wraps this chain therearound, a gear fixed to the one of said sprocket-wheels that is rotatively free from said shaft, a second gear fixed to said shaft, a gear intergearing said gears and means for reciprocatively turning said shaft.

NOAH S. HARTER. 

